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All Projects → M17-Project → Tr 9

M17-Project / Tr 9

Licence: gpl-2.0
TR-9, the (only) M17 system compatible handheld - schematics, PCB design files, BOM.

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TR-9

Read ERRATA.txt before building the mainboard!

TR-9 is a handheld transceiver (HT) for the M17 standard. Its specification can be found here. This repo contains KiCAD schematics and gerber files.

The source code has been moved to M17-project/TR-9_firmware. The codeplug example has been moved to TR-9_Codeplug

Capabilities

The TR-9 Radio will be capable of the following:

  • UHF band (420 MHz - 450 MHz)
  • Digital Voice (M17 Codec)
  • FM Voice
  • APRS via 1200 bps Packet (AX.25)
  • Short text messaging (SMS-like)
  • Optional Wi-Fi and GPS modules

Hardware

The heart of TR-9 is STM32F777VI microcontroller. The handheld also contains:

  • a DEM 128128A1 TMH-PWN 1.44" 128x128px TFT display
  • an ESP8266-12F WiFi module
  • an ADF7021 chip for the RF
  • an LSM9DS1 9DoF sensor
  • a USB-micro connector for firmware update (so-called DFU mode)
  • an SD-micro card slot for codeplug and storage
  • a connector for a GNSS module
  • a Kenwood connector for external MIC/SPK

RF output level can be regulated by the software. The maximum power output is 3 watts. The radio can work with both analog and digital modulation.

TR-9

Software

M17 standard was designed having Codec2 vocoder in mind. TR-9 takes advantage of STM's internal Advanced Encryption Standard (AES) hardware for optional end-to-end encryption. There is a possibility of using other block ciphers and scrambling.

Pinouts

Mainboard SWD/STLink: [GND, 3v3, CLK, DIO, RST], square pad is Pin 1 and therefore GND.

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